<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      body {
        height: 100%;
        box-sizing: border-box;
      }
      .ball {
        width: 100px;
        height: 100px;
        background: #747474;
        border-radius: 50%;
        position: absolute;
        top: 150px;
        left: 350px;
        animation: jump 1.5s infinite linear;
        animation-timing-function: cubic-bezier(0.5,0.05,1,0.5);
      }
      @keyframes jump {
        0% {
          transform: translate3d(0, 0, 0);
        }
        50% {
          transform: translate3d(0, -100px, 0);
        }
        100% {
          transform: translate3d(0, 0, 0);
        }
      }
    </style>
  </head>
  <body>
    <div class="ball"></div>
  </body>
</html>
